Sean Penn decided to go for a dip during his Hawaiian vacation on Wednesday (Oct. 5, 2016). But he wasn’t alone. The acclaimed actor was glimpsed enjoying the tropical destination with a young mystery blonde. The two even shared a kiss during their frolic in the surf!

Just last week, the young Aussie shared a photo of herself alongside Penn as the two recorded the audiobook for Pappy Pariah’s book Bob Honey: Who Just Do Stuff. Pariah is widely guessed to be Penn’s pseudonym.